- By hand solve the problem.
The life in hours of a thermocoupleused in furnace is known to be approximately normally distributed,with standard deviation σ=15 hours . A randomsample of 15 thermo-couples resulted in the following data:
193 | 192 | 221 | 183 | 180 |
200 | 207 | 187 | 190 | 219 |
193 | 222 | 189 | 190 | 197 |
- Using Z0. Is there evidence to support the claimthat the mean is 190 hours (α=.05) ?
- What is the P-value ?
- Construct a 99% two-sided CI on the mean life.
- Use the CI found in part (c) to test the hypothesis of parta
